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Abstract contains such well-known arthropods as scorpions, spiders, mites, ticks, and many others. The Subclass Acari includes the mites and ticks, and their study has been fastly developed, due to the significant importance of the medical and agricultural studies (Krantz, 1970 and Ramadan, 1995). Acari have vast populations in the soil and fresh or marine water. The aquatic Acari are known as water mites. According to Ward and Whipple (1958), the fresh water mites are those which live either in or very close to fresh water bodies. Water mites occupy a wide range of habitats, as stagnant |